* added upload, download, and delete functionality

* added error handling
* added CSS stylesheet
* bumped version to 0.3

css/updown.css

@@ -0,0 +1,13 @@
+.table {
+    display: table;
+    margin: 0 auto;
+}
+
+.tr {
+    display: table-row;
+}
+
+.td {
+    display: table-cell;
+}
+

package.json

@@ -1,6 +1,6 @@
 {
   "name": "updown",
-  "version": "0.2.0",
+  "version": "0.3.0",
   "description": "a simple file uploader/downloader",
   "main": "updown.js",
   "scripts": {
@@ -21,6 +21,7 @@
     "buffer": "^6.0.3",
     "crypto-browserify": "^3.12.0",
     "events": "^3.3.0",
+    "express-fileupload": "^1.4.1",
     "parcel": "^2.9.3",
     "path-browserify": "^1.0.1",
     "process": "^0.11.10",

updown.js

@@ -1,35 +1,115 @@
 const express = require('express');
+const fileupload = require('express-fileupload');
 const app = express();
 const port = 3000;
+const path = require('path');
 const fs = require('fs');
 const staticPath = "public/";
 
 app.set("view engine", "pug");
+app.use(fileupload());
+// serve static css files
+app.use(express.static(path.join(__dirname, 'css')));
 
-function getFilesAndSizes(path) {
+// Return all files and their sizes
+function getFilesAndSizes(dir) {
+  // check if dir exists
+  try {
+    fs.accessSync(dir, fs.constants.F_OK);
+  } catch (error) {
+    console.log("exist-check: " + error);
+    return [];
+  }
+  // check if dir is readable
+  try {
+    fs.accessSync(dir, fs.constants.R_OK);
+  } catch (error) {
+    console.log("read-check: " + error);
+    return [];
+  }
+  // get files and their sizes from path
   let files = [];
-  fs.readdirSync(path).forEach(filename => {
-    files.push({ name: filename, size: fs.statSync(path + filename, (e, s) => s).size });
+  fs.readdirSync(dir).forEach(filename => {
+    files.push({ name: filename, size: fs.statSync(dir + filename, (e, s) => s).size });
   })
-console.log(files);
+  console.log(files);//DEBUG
   return files;
 }
 
+// Handle main page request
 app.get('/', (req, res) => {
-  console.log(req.query);
-  res.render("updown", {
-    message: "method: get",
+  //TODO: handle sorting 
+  //TODO: keep sort parameter in variable or something
+  return res.render("updown", {
+    message: req.query.msg,
     files: getFilesAndSizes(staticPath)
   })
 })
 
-app.post("/", (req, res) => {
-  res.render("updown", {
-    message: "method: post",
-    files: getFilesAndSizes(staticPath)
+// Handle download request
+app.get('/download/:file', (req, res) => {
+  console.log('route /download/: params are ' + req.params);//DEBUG
+  res.download(staticPath + req.params['file'], error => {
+    if (!error)
+      return;
+    if (error.status === 404)
+      return res.redirect('/?msg=Download failed: file not found');
+    else
+      return res.redirect('/?msg=Download failed: Internal server error');
   });
 })
 
+// Handle delete request
+app.get('/delete/:file', (req, res) => {
+  console.log('route /delete/: params are ' + req.params);//DEBUG
+  // check if path is writable
+  fs.access(staticPath, fs.constants.w_OK, (error) => {
+    if (error) {
+      console.log("Deletion error: " + error.message);
+      return res.redirect("/?msg=Deletion failed: Path is not writable");
+    }
+  })
+  // delete file
+  try {
+    fs.rmSync(staticPath + req.params['file']);
+    return res.redirect("/?msg=File deleted");
+  } catch (error) {
+    if (error.message.startsWith("ENOENT")) {
+      return res.redirect("/?msg=Deletion failed: File doesn't exist");
+    } else {
+      console.log("Deletion error: " + error.message);
+      return res.redirect("/?msg=Deletion failed: Internal server error");
+    }
+  }
+})
+
+// Handle upload request
+app.post("/upload/", (req, res) => {
+  // check if request contains a file
+  if (!req.files || Object.keys(req.files).length === 0) {
+    console.log("Upload error: " + error.message);
+    return res.redirect("/?msg=Upload failed: no file selected");
+  }
+  // check if path is writable
+  fs.access(staticPath, fs.constants.w_OK, (error) => {
+    if (error) {
+      console.log("Upload error: " + error.message);
+      return res.redirect("/?msg=Upload failed: Path is not writable");
+    }
+  })
+  // upload file
+  let upFile = req.files.up;
+  upFile.mv(staticPath + upFile.name, (error) => {
+    if (!error)
+      return res.redirect("/?msg=File uploaded");
+    else {
+      console.log("Upload error: " + error.message);
+      return res.redirect("/?msg=Upload failed: Internal server error");
+    }
+  })
+})
+
+
 app.listen(port, () => {
   console.log(`updown listening on port ${port}`)
 })

views/updown.pug

@@ -2,23 +2,26 @@ doctype html
 html
   head(lang="en")
     title Updown
+    link(rel='stylesheet', href='/updown.css', type='text/css')
   body
-    div(align='center')
-      p= message
-    table(align='center')
-      form(method='get', action='')
-        tr
-          th
-            a(href='?sort=name') Uploaded File(s)
-          th
-            a(href='?sort=size') Size
-          th
-          th
+    div#message.table
+      div= message
+    div#f-upload.table
+      form#upload-form(method='post', enctype='multipart/form-data', action='/upload/')
+        label(for='up') Upload File
+        input#up(type='file', name='up')
+        button(type='submit') Submit
+    div#flist.table
+      div.tr#flist-heading
+        div.td
+          a(href='?sort=name') Uploaded File(s)
+        div.td
+          a(href='?sort=size') Size
       each file in files
-        tr
-          td= file.name
-          td= file.size
-          td
-            a(href='?download='+file.name alt="download") 🠳
-          td
-            a(href='?delete='+file.name alt="delete") 🞬
+        div.tr 
+          div.td= file.name
+          div.td= file.size
+          div.td
+            a(href='/download/'+file.name alt="download file") 🠳
+          div.td
+            a(href='/delete/'+file.name alt="delete file") 🞬